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REMOTE INTELLIGENT SENSOR - AREA MONITOR
Instruction 2772-0803 Page 1-3
1.3.8 SAMPLE INLET. The sample is brought
into the RIS through the short length of black FEP
tube and into the optic block. There are two types of
input tube; one has a single 0.25 inch (6 mm)
diameter tube, the other is a double tube arrange-
ment used for systems that monitor aerosols.
NOTE: It is essential that the input tube is
correctly fitted, if incorrectly fitted, the
measurement will be inaccurate (Figures
2-4 & 2-5).